Artificial tooth.



N0. 633,07I. Patented Sept. l2, I899. J. S. CAMPBELL.

ARTIFICIAL TOOTH.

(Application filed Oct. 15, 1895.\ (No Model.)

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UNITED STATEs PATENT OFFICE. V

THIN SMALLEY CAMPBELL, OF PARIS, FRANCE, ASSIGNOR TO THE DENTINAX (HO LDFAS'lllOO'lll) COMPANY, Llllll'll l'l), OF LONDON, ENGLAND.

ARTIFI IAL TOOTH.

SPECIFICATION forming part of Letters Iatent No. 633,071, dated September 12, 1899. Application filed October 15, 1895. Serial No. 565,764. (No model.)

To all (0710111, it may concern:

Be it known that I, JOHN SMALLEY CAMP- BELL, a citizen of the United States of America, residing at Paris, in the Republic of France, have in vented Improvements in Artificial Teeth, of which the following is a specification. .7

This invention is for in iprovements in artiiicial teeth of the kind in which a metal plate is baked into the body of the tooth, as described and claimed in my Patent No. 465,400, dated December 1891; and my present invention is designed to make the tooth much stronger, to secure the plate much more firmly in the tooth, to effect a material saving'in the quantiiy of metal (platinum) used in the making of the tooth, and to adapt the plate for being readily held in the mold during the molding of the tooth, as well as for holding a backing to the tooth during the process of adjusting and holding the backing to the plate.

Referring to the accompanying drawings, Figure 1 shows a front tooth embodying my invention. Fig. 2 shows the perforated plate with projection or pin integral therewith. Fig. 3 shows a plate for a molar.

A thin plate or piece a, of suitable metal, such as platinum, is made or cut or punched externally of aform to suit the porcelain tooth it is to be used in and with. Through it a hole or window 17 (or there may be more than one hole or window) is (or may be) at its lingual edge made or provided also with a projection c, which latter serves to hold the plate in the mold during'the molding of the tooth and also to hold a backing to the tooth while the backingis being adjusted and soldered to the tooth.v .1

The tooth while in the plastic state is molded through the hole or holes I), thus tying the twb sides of the tooth together and holding the plat-every firmly, while saving metal and still retaining all the advantages of the metal placed edgcwise, as claimed in my Patent No. 465,-l60, aforesaid, andwhen the plate is provided with the projectiomc the backing can 5 ing one part of the split end can be turnedto 50 one side and the other part to the other side, so as to hold the backing after the manner of at paper-fastener. In some cases the projection 0 may be dispensed with'and pinnrprojee tiou made separate can be applied.

\Vhat I claim is- 1. An artificial tooth comprising a porcelain body having baked therein a verticallyarranged plate having its outer edge flush: with the surface of the tooth for providing a' metal surface or surfaces for soldering to, and 1 a comparatively small outwardly-extendin g projection, substantially as described.

2. Ari-artificial tooth comprising a porce lain body and a skeleton plate a. molded and baked therein at right angles to the back Y thereof with its lingual edge flush with the corresponding surface of the tooth, the lingual edge of the plate having an integral out wardly-extending projectionc the parts combined and arranged to operate substantiallyas and for the purpose described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. 

